Precipitation hardening in Al-Cu-Mg alloys revisited
Precipitation hardening in Al-Cu-Mg alloys revisited
Transmission electron microscopy, differential scanning calorimetry and hardness tests have been used to study the precipitation sequence on artificial ageing of a stretched Al–Cu–Mg alloy. The samples were aged for different times at 150 and 190 °C, respectively. Some orthorhombic GPB2/S? is present in samples aged at 150 °C for 48 h, which is at the very start of the second stage of hardening. The combined experiments clearly show that the second stage hardening is dominated by S phase, which forms a dense precipitate structure at the peak hardness stage, whilst no significant amounts of other phases or zones are detected.
Al–Cu–Mg alloy, precipitate, TEM, DSC, hardness, strengthening
287-291
Wang, S.C.
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
2006
Wang, S.C.
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Gao, N.
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Abstract
Transmission electron microscopy, differential scanning calorimetry and hardness tests have been used to study the precipitation sequence on artificial ageing of a stretched Al–Cu–Mg alloy. The samples were aged for different times at 150 and 190 °C, respectively. Some orthorhombic GPB2/S? is present in samples aged at 150 °C for 48 h, which is at the very start of the second stage of hardening. The combined experiments clearly show that the second stage hardening is dominated by S phase, which forms a dense precipitate structure at the peak hardness stage, whilst no significant amounts of other phases or zones are detected.
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- Author's Original
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Published date: 2006
Keywords:
Al–Cu–Mg alloy, precipitate, TEM, DSC, hardness, strengthening
Identifiers
Local EPrints ID: 19324
URI: http://eprints.soton.ac.uk/id/eprint/19324
ISSN: 1359-6462
PURE UUID: 287d225c-4fc0-46f0-93e7-c3081a57a323
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Date deposited: 01 Feb 2006
Last modified: 16 Mar 2024 03:21
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